In this lesson you’ll learn how and where you can use the “Not” instruction.
If you suddenly change the rotation direction of a heavy duty motor, the motor is going to be damaged. In this lesson I’m going to write a PLC program that can protect the motor when it’s going to reverse direction. We’ll change the motor rotation direction without damaging it.
In the previous lesson I found out that the motor won’t reverse direction after the delay. In this lesson I’m going to complete the program to solve this issue.
In the previous lesson I wrote a PLC program to safe guard a press machine. In this lesson I’m going to make that program more advanced using an on-delay timer.
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